From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carl-Daniel Hailfinger Subject: Re: Samsung P35, S3, black screen (radeon) Date: Thu, 03 Feb 2005 23:45:06 +0100 Message-ID: <4202A972.1070003@gmx.net> References: <20050122134205.GA9354@wsc-gmbh.de> <4201825B.2090703@gmx.net> <420217DB.709@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit In-Reply-To: <420217DB.709-hi6Y0CQ0nG0@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Pavel Machek Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Carl-Daniel Hailfinger schrieb: > Stefan Schweizer schrieb: > >>Are you able to use framebuffer(radeonfb,1024x768) with this >>configuration or do you need to use plain vga-console for it to work? > > No. > For a working framebuffer console you would have to perform the steps > my script does *before* the kernel tries to access the framebuffer > console after resume. Since this is not yet possible, you're out of > luck. If > - the vbestate utility was a kernel module or OK, I managed to track this down further. "vbetool post" should be equivalent to "acpi_sleep=s3_bios", but there are some differences. For me, that's easy to explain: "vbetool post" segfaults because it wants to access parts of the video bios which are no longer available. "acpi_sleep=s3_bios" suffers from the same problem, but it runs in real mode and can't recover :-( To alleviate that problem, the kernel could run the video bios in vm86 mode (like vbetool does by using lrmi). This would simplify the asm wakeup code and make video POST more reliable. Pavel, what do you think? Regards, Carl-Daniel -- http://www.hailfinger.org/ ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl